Add paths-ignore filters to SDK test workflows

[Copilot]

SDK test workflows currently trigger on any file change within their directory (e.g., nodejs/**), including documentation and assets that don't affect behavior.

Changes

Added paths-ignore filters to all SDK test workflows to skip CI for:

• Documentation: **/*.md
• Licenses: **/LICENSE*
• Editor config: **/.gitignore, **/.editorconfig
• Images: **/*.png, **/*.jpg, **/*.jpeg, **/*.gif, **/*.svg

Example from nodejs-sdk-tests.yml:

on:
  pull_request:
    paths:
      - 'nodejs/**'
      - 'test/**'
      - '.github/workflows/nodejs-sdk-tests.yml'
      - '.github/actions/setup-copilot/**'
    paths-ignore:
      - '**/*.md'
      - '**/LICENSE*'
      - '**/.gitignore'
      - '**/.editorconfig'
      - '**/*.png'
      - '**/*.jpg'
      - '**/*.jpeg'
      - '**/*.gif'
      - '**/*.svg'

Notably excludes **/*.txt from ignore patterns since files like python/test-requirements.txt contain dependency specifications that affect test behavior.

Applied to: nodejs-sdk-tests.yml, python-sdk-tests.yml, dotnet-sdk-tests.yml, go-sdk-tests.yml

Original prompt

the e2e workflow actions filter on changes per directory, but we don't distinguish between edits that change the behavior vs. edits that don't. eg. editing readme.md doesn't change the behavior of the code so it doesn't really make sense to run CI in those cases. find a better heuristic that will more reliably filter CI execution going forward

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[Copilot]

Pull request overview

Reduces unnecessary CI runs by adding paths-ignore filters to SDK test workflows so documentation, licenses, editor config files, and common image formats don’t trigger SDK test jobs.

Changes:

• Added paths-ignore entries for **/*.md, **/LICENSE*, **/.gitignore, **/.editorconfig, and common image extensions to SDK test workflows.
• Kept .txt files unignored to avoid skipping dependency/spec changes (e.g., requirements files).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
.github/workflows/nodejs-sdk-tests.yml	Adds paths-ignore to avoid running Node.js SDK tests on doc/license/editor-config/image-only changes.
.github/workflows/python-sdk-tests.yml	Adds paths-ignore to avoid running Python SDK tests on doc/license/editor-config/image-only changes.
.github/workflows/go-sdk-tests.yml	Adds paths-ignore to avoid running Go SDK tests on doc/license/editor-config/image-only changes.
.github/workflows/dotnet-sdk-tests.yml	Adds paths-ignore to avoid running .NET SDK tests on doc/license/editor-config/image-only changes.

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