RFR: 8316421: libjava should load shell32.dll eagerly [v3]

[Daniel Jeliński]

> Please review this patch that makes java.dll load shell32.dll earlier. Delay-loading requires some additional code (delayimp.lib), and offers no benefits since we always load shell32 during JVM startup.
> 
> Other than removing the delayload clause, the patch also cleans up the `getHomeFromShell32` method:
> - the WinXP code path is removed. The documentation states that [the older function just calls the new one with translated parameters](https://learn.microsoft.com/en-us/windows/win32/api/shlobj_core/nf-shlobj_core-shgetfolderpatha).
> - `CoTaskMemFree` is now called if `SHGetKnownFolderPath` fails. This is suggested by the documentation, but probably never needed in practice.
> 
> This change shouldn't have any observable effect on behavior on any of the supported operating systems. It reduced the size of java.dll by 2KB on my machine.
> No new tests. Existing tier1-2 tests continue to pass.

Daniel Jeliński has updated the pull request incrementally with one additional commit since the last revision:

  Inline variable declaration

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15789/files
  - new: https://git.openjdk.org/jdk/pull/15789/files/1fa01288..3f37efa5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15789&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15789&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15789.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15789/head:pull/15789

PR: https://git.openjdk.org/jdk/pull/15789