[core] PHP compat issues

[siad007]

• Skipping some test cases for dependency which will fail on PHP 8.1 and are not part of phing
• Some changes depends on PHP compat issues

[codecov]

Codecov Report

Merging #1563 (85751d5) into main (929c03c) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 85751d5 differs from pull request most recent head 2b1ca9e. Consider uploading reports for the commit 2b1ca9e to get more accurate results

@@            Coverage Diff            @@
##               main    #1563   +/-   ##
=========================================
  Coverage     55.96%   55.96%           
  Complexity     6913     6913           
=========================================
  Files           355      355           
  Lines         16739    16739           
=========================================
  Hits           9368     9368           
  Misses         7371     7371           

Impacted Files	Coverage Δ	Complexity Δ
src/Phing/Io/File.php	83.15% <ø> (ø)	91.00 <0.00> (ø)
src/Phing/Io/BufferedReader.php	81.63% <100.00%> (ø)	21.00 <0.00> (ø)
src/Phing/Io/IniFileParser.php	100.00% <100.00%> (ø)	12.00 <0.00> (ø)
.../Phing/Task/System/Pdo/DefaultPDOQuerySplitter.php	97.87% <100.00%> (ø)	20.00 <0.00> (ø)
src/Phing/Task/System/Pdo/PDOSQLExecTask.php	44.57% <100.00%> (ø)	75.00 <0.00> (ø)
src/Phing/Util/StringHelper.php	86.84% <100.00%> (ø)	23.00 <0.00> (ø)

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