Convert 'p' prefixes to 'path' in tool/ (#3472) #3296

Job	Run time
test (ubuntu-latest, dev, main)	13m 47s
test (ubuntu-latest, dev, flutter)	31m 46s
test (ubuntu-latest, dev, sdk-analyzer)	58s
test (ubuntu-latest, dev, packages)	3m 21s
test (ubuntu-latest, dev, sdk-docs)	2m 33s
test (ubuntu-latest, stable, main)	12m 34s
test (ubuntu-latest, stable, sdk-analyzer)	1m 6s
test (ubuntu-latest, stable, packages)	2m 57s
test (macos-latest, dev, main)	18m 6s
test (windows-latest, dev, main)	15m 26s
	1h 42m 34s

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