[AIROCMLIR-597][CI] Extract Jenkinsfile helpers into helpers/*.groovy and load them in a Bootstrap stage (#2360)

* [NFC] Extract Jenkinsfile helpers into helpers/*.groovy and load them in a Bootstrap stage

Signed-off-by: bogdan-petkovic <bogdan.petkovic@htecgroup.com>

* address Copilot review comments

Signed-off-by: bogdan-petkovic <bogdan.petkovic@htecgroup.com>

* Extract post.always notification block into ciLogic.handlePostBuildNotification

Signed-off-by: bogdan-petkovic <bpetkovi@amd.com>

* Extract matrix row bodies and post-build hook into ciLogic helpers

Signed-off-by: bogdan-petkovic <bpetkovi@amd.com>

* [AIROCMLIR-597][CI] Fix indentation of Python heredoc in ciLogic.runTuneMatrixRow

Signed-off-by: bogdan-petkovic <bpetkovi@amd.com>

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Signed-off-by: bogdan-petkovic <bogdan.petkovic@htecgroup.com>
Signed-off-by: bogdan-petkovic <bpetkovi@amd.com>
Co-authored-by: Đorđe Antić <anticdj01@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: 3 people