Remove debug legs from CI build

[jander-msft]

Summary

There is practically no utility in building the debug variants of the product in the official CI build:

• The official CI build already does not test debug bits.
• The public PR builds already build and run all of the latest TFM tests for debug binaries, which should provide enough coverage for new changes that introduce problems that would only show in debug builds.
• Very little of the source code makes use of debug flags for altering product or test functionality.
• Historically, very few issues have been caught by debug build legs in the CI build.

By removing debug variants from the CI build, compute utilization will be reduced and compliance tooling will not have to consider debug bits.

Release Notes Entry

[jander-msft]

/backport to release/8.0

[github-actions]

Started backporting to release/8.0: https://github.com/dotnet/dotnet-monitor/actions/runs/9165729655

[jander-msft]

/backport to release/6.x

[github-actions]

Started backporting to release/6.x: https://github.com/dotnet/dotnet-monitor/actions/runs/9165736923

[github-actions]

@jander-msft backporting to release/6.x failed, the patch most likely resulted in conflicts.

Please backport manually using one of the below commands, followed by git am --continue once the merge conflict has been resolved.

PowerShell

(Invoke-WebRequest "https://github.com/dotnet/dotnet-monitor/commit/ce1b22124c629463ea63383bb51a05f0c56b2971.patch").Content | git am --3way --ignore-whitespace --exclude="documentation/**.md" --keep-non-patch

Bash

curl -sSL "https://github.com/dotnet/dotnet-monitor/commit/ce1b22124c629463ea63383bb51a05f0c56b2971.patch" | git am --3way --ignore-whitespace --exclude="documentation/**.md" --keep-non-patch

---

git am error output:

$ git am --3way --ignore-whitespace --exclude="documentation/**.md" --keep-non-patch changes.patch

Applying: Remove debug legs from CI build (#6685)
Using index info to reconstruct a base tree...
M	eng/pipelines/dotnet-monitor-official.yml
Falling back to patching base and 3-way merge...
Auto-merging eng/pipelines/dotnet-monitor-official.yml
CONFLICT (content): Merge conflict in eng/pipelines/dotnet-monitor-official.yml
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"
Patch failed at 0001 Remove debug legs from CI build (#6685)
Error: The process '/usr/bin/git' failed with exit code 128