Update dependency phpunit/phpunit to v12 #3420

Job	Run time
Check Backwards Compatibility (locked, 8.3, ubuntu-latest)	11s
Check Backwards Compatibility (locked, 8.2, ubuntu-latest)	12s
Check Backwards Compatibility (locked, 8.4, ubuntu-latest)	14s
Generate job matrix	11s
Composer Require Checker (locked, 8.3, ubuntu-latest)	57s
QA Checks (PHPCodeSniffer [8.2, locked], ubuntu-latest, laminas/laminas-continuous-integration-ac...	25s
QA Checks (PHPUnit [8.3, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	56s
QA Checks (PHPUnit [8.2, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	24s
QA Checks (PHPUnit [8.3, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	59s
QA Checks (PHPUnit [8.2, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	27s
QA Checks (Psalm [8.2, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1, ...	27s
QA Checks (PHPUnit [8.4, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	54s
QA Checks (PHPUnit [8.2, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	31s
QA Checks (Infection (PCOV) [8.2, locked], ubuntu-latest, laminas/laminas-continuous-integration-...	24s
	7m 12s

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