[ci]Exclude markdown file edits from triggering full build (#24418)

* Update ci.yml

Add path exclusions for markdown files.

* Update wildcard syntax

* Test edit SUPPORT.md

* Update ci.yml

* Test Update SUPPORT.md

* Update SUPPORT.md

Test update SUPPORT again.

* Update ci.yml

* Explicit define of markdown files at root

* Test update SUPPORT.md

* Update ci.yml

* Another Test Update SUPPORT.md

* Script to check existence of markdown changes in commit

* Added precheck job to determine whether a build needs to occur

* Added pool logic from ci-build to precheck

* Fixed GitHub API url for commits

* Test change to SUPPORT.md to see if logic works.

* Converted filename list to array to make notmatching criteria work

* Change to SUPPORT.md to test

* Updated condition to check success of previous precheck job

* Added task name to verifyBuildRequest and updated job run condition

* Another update to SUPPORT.md to test

* Updated spell-check

* Removed checkout step and made Powershell task inline

* Fixed indentation

* Test change to SUPPORT.md

* Fixing script

* Another test change to SUPPORT.md

* [CI] Update Build Precheck step to use latest agent config

* Update SUPPORT.md

* Update SUPPORT.md

* [CI] Update Build Precheck to exclude .txt and read changes from pull request

* [CI] Remove unneeded verifyBuildRequest script

* [CI] Updated variable names to reflect pull request retrieval in precheck

.github/actions/spell-check/expect.txt

@@ -1744,6 +1744,7 @@ SETTINGCHANGE
 SETTINGSCHANGED
 settingsheader
 settingshotkeycontrol
+setvariable
 SETWORKAREA
 setzero
 sfgao
@@ -2143,6 +2144,7 @@ vsconfig
 VSCROLL
 vsetq
 VSM
+vso
 vsonline
 vstemplate
 VSTHRD