Build/Test: Set svn:global-ignore for built block files.

After [62117] through [62144] along with [62147] through [62149], a number of block directories included css files as the result of `npm build`. To fix this and prevent a recurrence when new blocks are added, this moves from the `svn:ignore` property needing to be set on each individual directory to using the `svn:global-ignores` property which is recursive.

This was accomplished by running the following commands:

{{{
svn propdel svn:ignore -R src/wp-includes/blocks/*
svn propset svn:global-ignores '*.css
*.js
*.js.map' src/wp-includes/blocks
}}}

Discussed in https://wordpress.slack.com/archives/C08D0Q6BHNY/p1774546046110849

Reviewed-by:dmsnell and jonsurrell.

Props dmsnell, johnbillion, jonsurrell, jorbin.
See #64393.



git-svn-id: https://develop.svn.wordpress.org/trunk@62155 602fd350-edb4-49c9-b593-d223f7449a82