update spotless to 7.2 and reformat

[derrickaw]

1. Fixes errors seen in Bump com.diffplug.spotless from 5.6.1 to 8.4.0 #38390 and Bump com.diffplug.spotless:spotless-plugin-gradle from 5.6.1 to 8.4.0 #38388 by ugrading to 7.2 etc. 8.4 not supported until beam removes support for Java 11.
2. Upgrade java formatter to 1.17.
3. With these changes, spotless requires many reformatings of files.

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