[TASK] Ensure composer update installs the highest possible packages

By unsetting the PHP version in config platform.php, we ensure the
highest possible packages for the currently available PHP version are installed.

Resolves: #92335
Related: #92251
Releases: master, 10.4
Change-Id: Id6359014aa950bd65622e7fd8dac26313a6778c5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65754
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>

Build/bamboo/pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.atlassian.bamboo</groupId>
     <artifactId>bamboo-specs-parent</artifactId>
-    <version>6.10.4</version>
+    <version>7.1.2</version>
     <relativePath/>
   </parent>
 

Build/bamboo/src/main/java/core/AbstractCoreSpec.java

@@ -1739,6 +1739,7 @@ Task getTaskComposerUpdateMax(String requirementIdentifier) {
             .inlineBody(
                 this.getScriptTaskBashInlineBody() +
                     this.getScriptTaskComposer(requirementIdentifier) +
+                    "composer config --unset platform.php \n" +
                     "composer update --no-progress --no-suggest --no-interaction"
             )
             .environmentVariables(this.composerRootVersionEnvironment);