Removing PHP - FPM Buster (#2509)

* removing php fpm dockerfiles

* removing php-fpm buster tests

* removing some more php-fpm buster occurences

* updated images/contants.yml

* resolved merge conflict

---------

Co-authored-by: OGFTestPipeline <antuxcore@microsoft.com>
Co-authored-by: Pratham Bande <prathambande@microsoft.com>

build/constants.yaml

@@ -238,15 +238,10 @@
     - 8.3-debian-bookworm
     fpm-runtime-versions:
     - 7.4-fpm-debian-bullseye
-    - 7.4-fpm-debian-buster
     - 8.0-fpm-debian-bullseye
-    - 8.0-fpm-debian-buster
     - 8.1-fpm-debian-bullseye
-    - 8.1-fpm-debian-buster
     - 8.2-fpm-debian-bullseye
-    - 8.2-fpm-debian-buster
     - 8.3-fpm-debian-bullseye
-    - 8.3-fpm-debian-buster
     - 8.3-fpm-debian-bookworm
   outputs:
   - type: csharp

images/constants.yml

@@ -19,13 +19,13 @@ variables:
   dotnet70DebianFlavors: buster,bullseye
   dotnet80DebianFlavors: bullseye,bookworm
   dotnet90DebianFlavors: bookworm
-  php81DebianFlavors: bullseye,buster
-  php82DebianFlavors: bullseye,buster
-  php83DebianFlavors: bullseye,buster,bookworm
+  php81DebianFlavors: bullseye
+  php82DebianFlavors: bullseye
+  php83DebianFlavors: bullseye,bookworm
   debianFlavors: buster,bullseye,bookworm
   dotnetDebianFlavors: bookworm,bullseye,buster
   nodejsDebianFlavors: bookworm,bullseye
-  phpDebianFlavors: bookworm,bullseye,buster
+  phpDebianFlavors: bookworm,bullseye
   pythonDebianFlavors: bookworm,bullseye,buster
   cliDebianFlavors: buster,bullseye
   cliBuilderDebianFlavors: buster,bullseye