Summary: Add differential flamegraph script

This depends on #2043.

Relevant Issues: N/A

Type of change: /kind new-pxl-script

Test Plan: Ran the local UI and verified that the non negated version
works as expected

![differential](https://github.com/user-attachments/assets/e021d5f6-e3e2-4d5c-a3a6-17612695e429)

Changelog Message: Add `px/differential_flamegraph` script for comparing
flamegraphs profiles between pods. See [this
post](https://www.brendangregg.com/blog/2014-11-09/differential-flame-graphs.html)
for more background on how to use a differential flamegraph.

---------

Signed-off-by: Dom Del Nano <ddelnano@gmail.com>

Summary: Fix release note generation script

Our releases have blank release notes. This makes it difficult for end
users to understand what has changed between releases. This PR updates
the existing script that was built to auto generate changelog notes.

Relevant Issues: N/A

Type of change: /kind bug

Test Plan: Ran the script for each artifact type and verified the output
was expected
- [x] cli release notes are expected
```
$ ./scripts/create_release_tag.sh cli -n
$ git tag -l --format='%(contents)' release/cli/v0.9.0-pre-ddelnano-fix-release-note-generation.4
### New Features
- (#2048) Enhanced the `px` cli to detect OpenShift clusters
and prompt to install the appropriate SecurityContextConstraints before
proceeding with a deploy
```
- [x] vizier release notes are expected
```
# Needed to modify prev_tag in script since v0.14.13 to main's HEAD doesn't have vizier changelog messages
$ ./scripts/create_release_tag.sh vizier -n
$ git tag -l --format='%(contents)' release/vizier/v0.15.0-pre-main.4
### Bug Fixes
- (#2047) Ensures that the `--stirling_bpf_loop_limit` and
`--stirling_bpf_chunk_limit` values are respected if explicitly provided
on the command line. For 5.1 and later kernels, cli provided values
would have been ignored

```
- [x] cloud release notes are generated correctly
```
$ ./scripts/create_release_tag.sh cloud -n
Generating changelog from release/cloud/v0.1.8..release/cloud/v0.2.0-pre-ddelnano-fix-release-note-generation.1

$ git tag -l --format='%(contents)' release/cloud/v0.2.0-pre-ddelnano-fix-release-note-generation.1
### New Features
- (#2043) Add support for rendering differential flamegraphs in
the `StackTraceFlameGraph` display spec
### Bug Fixes
- (#2041) Upgraded bcc and libbpf to support kernels 6.10 and
later
```

…ameGraph` display spec (pixie-io#2043)

Summary: Support rendering differential flamegraphs in the
`StackTraceFlameGraph` display spec

This change makes it possible to render a [differential
flamegraphs](https://www.brendangregg.com/blog/2014-11-09/differential-flame-graphs.html).
These are useful for comparing flamegraph profiles against each other in
order to see what code paths are called more or less than the baseline
profile. When a Vis spec specifies a `differenceColumn`, the widget will
render this differential flamegraph. The difference column computes the
sample delta between the baseline profile and the new profile.

Relevant Issues: N/A

Type of change: /kind feature

Test Plan: New unit tests pass and pxl script relying on this works as
expected (see pixie-io#2044)

![differential](https://github.com/user-attachments/assets/3f86ee2d-c0a1-402b-9455-b1e22b522fe1)

Changelog Message: Add support for rendering differential flamegraphs in
the `StackTraceFlameGraph` display spec

GitOrigin-RevId: 4778ba1

Summary: Add differential flamegraph script

This depends on pixie-io#2043.

Relevant Issues: N/A

Type of change: /kind new-pxl-script

Test Plan: Ran the local UI and verified that the non negated version
works as expected

![differential](https://github.com/user-attachments/assets/e021d5f6-e3e2-4d5c-a3a6-17612695e429)

Changelog Message: Add `px/differential_flamegraph` script for comparing
flamegraphs profiles between pods. See [this
post](https://www.brendangregg.com/blog/2014-11-09/differential-flame-graphs.html)
for more background on how to use a differential flamegraph.

---------

Signed-off-by: Dom Del Nano <ddelnano@gmail.com>
GitOrigin-RevId: fd5cd63

Summary: Fix release note generation script

Our releases have blank release notes. This makes it difficult for end
users to understand what has changed between releases. This PR updates
the existing script that was built to auto generate changelog notes.

Relevant Issues: N/A

Type of change: /kind bug

Test Plan: Ran the script for each artifact type and verified the output
was expected
- [x] cli release notes are expected
```
$ ./scripts/create_release_tag.sh cli -n
$ git tag -l --format='%(contents)' release/cli/v0.9.0-pre-ddelnano-fix-release-note-generation.4
### New Features
- (pixie-io#2048) Enhanced the `px` cli to detect OpenShift clusters
and prompt to install the appropriate SecurityContextConstraints before
proceeding with a deploy
```
- [x] vizier release notes are expected
```
# Needed to modify prev_tag in script since v0.14.13 to main's HEAD doesn't have vizier changelog messages
$ ./scripts/create_release_tag.sh vizier -n
$ git tag -l --format='%(contents)' release/vizier/v0.15.0-pre-main.4
### Bug Fixes
- (pixie-io#2047) Ensures that the `--stirling_bpf_loop_limit` and
`--stirling_bpf_chunk_limit` values are respected if explicitly provided
on the command line. For 5.1 and later kernels, cli provided values
would have been ignored

```
- [x] cloud release notes are generated correctly
```
$ ./scripts/create_release_tag.sh cloud -n
Generating changelog from release/cloud/v0.1.8..release/cloud/v0.2.0-pre-ddelnano-fix-release-note-generation.1

$ git tag -l --format='%(contents)' release/cloud/v0.2.0-pre-ddelnano-fix-release-note-generation.1
### New Features
- (pixie-io#2043) Add support for rendering differential flamegraphs in
the `StackTraceFlameGraph` display spec
### Bug Fixes
- (pixie-io#2041) Upgraded bcc and libbpf to support kernels 6.10 and
later
```

GitOrigin-RevId: e2a6737