RFR: 8355339: Test java/io/File/GetCanonicalPath.java failed: The specified network name is no longer available

[Brian Burkhalter]

At line 143 of `canonicalize_md.c`, add `ERROR_NETNAME_DELETED` to the set of error codes that `lastErrorReportable()` deems innocuous. The other changes are opportunistic cleanup of indentation without behavioral effect.

-------------

Commit messages:
 - 8355339: Test java/io/File/GetCanonicalPath.java failed: The specified network name is no longer available

Changes: https://git.openjdk.org/jdk/pull/27532/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27532&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355339
  Stats: 10 lines in 1 file changed: 1 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/27532.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27532/head:pull/27532

PR: https://git.openjdk.org/jdk/pull/27532