[e2e] Trim low-value e2e tests, fold --only quote variants, revive orphaned rules-summary test

[TomasVotruba]

Trims the e2e suite down to tests that cover real engine/CLI behaviour, and fixes one e2e test that silently never ran. 26 -> 16 CI jobs, each of which did 2 full composer install.

Removed: 7 tests that only re-assert unit-tested rule behaviour

removed	already covered by
applied-rule-removed-node	fixture byte-identical to applied-rule-removed-node-with-cache and -no-diffs, which both run it
invalid-paths	plain path validation, no engine-specific behaviour
print-new-node	AddParamBasedOnParentClassMethodRector has 22 fixtures + 8 cross-file Source/ parents in its rules-test; phpstan-container-bootstrap runs the same rule end-to-end
applied-rule-change-docblock	RenameClassRector on a docblock by applied-auto-import, RemoveUselessVarTagRector by config-dist-fallback + config-file-priority. Its third rule, DowngradeAttributeToAnnotationRector, produced no change in the expected output at all
applied-rule-return-array-nodes	its src/ is byte-identical to only-option/src, with the same 2 rules
different-path-over-skip-config	SkippedPathsResolverTest + SkipperRectorRuleTest
no-parallel-reflection-resolver	same fixture as parallel-reflection-resolver; the non-parallel path is what every rules-test runs

Fixed: rules-summary-option never ran

It was present in e2e/ but listed in no workflow, so CI never executed it. Having gone unrun, its expected output had rotted to the pre-@@ Line N @@ hunk header format:

-@@ @@
+@@ Line 4 @@

Refreshed and added to the matrix, so --rules-summary is actually covered again.

Folded: 4 --only quote variants into only-option

only-option-quote-single, -quote-single-equalnone, -quote-single-bsdouble and -quote-double-equalnone had identical rector.php, identical expected-output.diff, and all pointed at only-option/src. They differed only in the shell quoting of one option, yet each burned a separate CI job.

The runner now takes an explicit options file, so a single job covers all 5 quotings:

-$cliOptions = 'cli-options.txt';
+// allow running the same fixture with another set of CLI options, e.g. various quoting of the same option
+$cliOptionsIndex = array_search('--cli-options', $argv, true);
+$cliOptions = $cliOptionsIndex === false ? 'cli-options.txt' : $argv[$cliOptionsIndex + 1];

# the "--only" option must handle any shell quoting of the very same rule class
- run: |
    php ../e2eTestRunner.php --cli-options cli-options-quote-single.txt
    php ../e2eTestRunner.php --cli-options cli-options-quote-single-bsdouble.txt
    php ../e2eTestRunner.php --cli-options cli-options-quote-single-equalnone.txt
    php ../e2eTestRunner.php --cli-options cli-options-quote-double-equalnone.txt

All 5 quoting variants verified locally:

### cli-options.txt                              [OK] End-to-end test successfully completed
### cli-options-quote-single.txt                 [OK] End-to-end test successfully completed
### cli-options-quote-single-bsdouble.txt        [OK] End-to-end test successfully completed
### cli-options-quote-single-equalnone.txt       [OK] End-to-end test successfully completed
### cli-options-quote-double-equalnone.txt       [OK] End-to-end test successfully completed

Kept

Everything exercising the engine or CLI that cannot be unit tested: cache reuse, parallel worker escaping / reflection / skip aggregation, --no-diffs, --output-format=json, --rules-summary, --only, -c/--config, rector.dist.php resolution, bootstrapFiles(), real vendor polyfill detection, and name importing.

composer.json autoload-dev drops the no-parallel-reflection-resolver PSR-4 path; composer validate passes.

The 11 obsolete required status checks on main were removed, so PRs are not blocked waiting on jobs that no longer exist.