vim: Import v9.1.0631

* 9.1.0631: wrong completion list displayed with non-existing dir + fuzzy completion
* 9.1.0630: MS-Windows: build fails with VIMDLL and mzscheme
* 9.1.0629: Rename of pum hl_group is incomplete
* 9.1.0628: MinGW: coverage files are not cleaned up
* 9.1.0627: MinGW: build-error when COVERAGE is enabled

gitlog.txt

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-* [9.1.0626](https://github.com/vim/vim/commit/94082b60d5087246b19615d9b7d46e377c4eb766): Vim9: need more tests with null objects\n* [runtime(autohotkey): include initial filetype plugin](https://github.com/vim/vim/commit/a7295ae7f5b956758f1c9c9a29d10c48661b29bc)\n* [9.1.0625](https://github.com/vim/vim/commit/6ed8ae837b9c19985c4291c885544f3f2f624154): tests: test output all translated messages for all translations\n* [9.1.0624](https://github.com/vim/vim/commit/70a11a6bf69f477844470ce59958b686024d2a41): ex command modifiers not found\n* [9.1.0623](https://github.com/vim/vim/commit/325420ebe459e7f67b959ce189269b0e8ca9dc12): Mingw: errors when trying to delete non-existing files\n* [9.1.0622](https://github.com/vim/vim/commit/032accd98b6915b5d642a2d059cc666c2c786579): MS-Windows: mingw-build can be optimized\n* [9.1.0621](https://github.com/vim/vim/commit/b32d0a479d18512be551a3bca6366796c47d2633): MS-Windows: startup code can be improved\n* [9.1.0620](https://github.com/vim/vim/commit/be82825687fcf020dc79667cc1cdf62ace2215f2): Vim9: segfauls with null objects\n* [9.1.0619](https://github.com/vim/vim/commit/8754efe437fcb17ad2c64192f8722e08d68e032e): tests: test\_popup fails
+* [9.1.0631](https://github.com/vim/vim/commit/6b6280c4a270547f84f01c0e0d9be1b7d6bb9e20): wrong completion list displayed with non-existing dir + fuzzy completion\n* [9.1.0630](https://github.com/vim/vim/commit/f0ce176b5ff631cbc4d149e9f6ba03e78a9bf2a6): MS-Windows: build fails with VIMDLL and mzscheme\n* [9.1.0629](https://github.com/vim/vim/commit/4100852e099133a0c9603e1087e5dc6d82001ce7): Rename of pum hl\_group is incomplete\n* [9.1.0628](https://github.com/vim/vim/commit/f08865ce8309a7d4c7d55d5d9d60b9062eca5370): MinGW: coverage files are not cleaned up\n* [9.1.0627](https://github.com/vim/vim/commit/e4486bad10dc605e2c996c9ef2f7656c01c7eb33): MinGW: build-error when COVERAGE is enabled