Large .dat files written to Temp directories (Windows)

On [test-azure-win2012r2-x64-1](https://ci.adoptopenjdk.net/computer/test-azure-win2012r2-x64-1/), [test-azure-win2012r2-x64-3](https://ci.adoptopenjdk.net/computer/test-azure-win2012r2-x64-3/) and [test-azure-win2019-x64-1](https://ci.adoptopenjdk.net/computer/test-azure-win2019-x64-1/) their Temp directories are filled up with large .dat files, whose origin is unknown

[test-azure-win2012r2-x64-1](https://ci.adoptopenjdk.net/computer/test-azure-win2012r2-x64-1/)
```
adoptopenjdk@test-2012r2-1 /cygdrive/c/Users/jenkins.test-2012r2-1/AppData/Local/Temp
$ ls -la *.dat
-rwx------+ 1 jenkins None 2147484671 Oct 10 2021 dst12191381147079577745.dat
-rwx------+ 1 jenkins None 2147484671 May 8 03:13 dst8808757851773313999.dat
-rwx------+ 1 jenkins None 2147484671 Oct 10 2021 src10083073893585810729.dat
-rwx------+ 1 jenkins None 0 Jun 19 01:10 src12523888732483928706.dat
-rwx------+ 1 jenkins None 0 Jun 26 01:35 src14450829699699143094.dat
-rwx------+ 1 jenkins None 0 Jul 3 02:00 src16185337324852676813.dat
-rwx------+ 1 jenkins None 0 Jul 10 22:30 src17095945012730825308.dat
-rwx------+ 1 jenkins None 2147484671 May 8 03:13 src17662931351367789633.dat
-rwx------+ 1 jenkins None 2147484671 May 8 04:37 src17862466297894479515.dat
-rwx------+ 1 jenkins None 0 Jul 10 02:01 src17894327494747906074.dat
-rwx------+ 1 jenkins None 0 Jun 26 05:03 src5264114818175128872.dat
-rwx------+ 1 jenkins None 0 Jul 10 04:11 src7319034148243782179.dat
```

[test-azure-win2012r2-x64-3](https://ci.adoptopenjdk.net/computer/test-azure-win2012r2-x64-3/)

```
AdoptopenJDK@test-2012r2-3 /cygdrive/c/Users/jenkins/AppData/Local/Temp
$ ls -la *.dat
-rwx------+ 1 jenkins None 2147484671 Jul 3 18:26 dst10525283875402494967.dat
-rwx------+ 1 jenkins None 2147484671 Jan 9 2022 dst1090982662380210025.dat
-rwx------+ 1 jenkins None 2147484671 Jan 9 2022 dst14090557438999081470.dat
-rwx------+ 1 jenkins None 2147484671 Oct 17 2021 dst15451742831967023501.dat
-rwx------+ 1 jenkins None 2147484671 May 8 02:44 dst16767680786618213670.dat
-rwx------+ 1 jenkins None 2147484671 Jul 3 00:59 dst5560256765629115735.dat
-rwx------+ 1 jenkins None 2147484671 Jul 4 00:14 src11220301557628620189.dat
-rwx------+ 1 jenkins None 2147484671 Jul 3 18:26 src12371769305297563754.dat
-rwx------+ 1 jenkins None 2147484671 Jul 3 00:59 src1798870126431615614.dat
-rwx------+ 1 jenkins None 2147484671 Jul 10 21:06 src5646674978054390026.dat
```

[test-azure-win2019-x64-1](https://ci.adoptopenjdk.net/computer/test-azure-win2019-x64-1/)
```
adoptopenjdk@test-win2019-1 /cygdrive/c/Users/jenkins/AppData/Local/Temp
$ ls -la *.dat
-rwx------+ 1 jenkins None 5368709122 Feb 7 01:57 LargeGatheringWrite3322105129955012357.dat
-rwx------+ 1 jenkins None 5368709122 Feb 20 08:19 LargeGatheringWrite9933378702831300867.dat
-rwx------+ 1 jenkins None 2147484671 Mar 14 09:43 dst12651648640093188310.dat
-rwx------+ 1 jenkins None 2147484671 Feb 6 10:31 dst183570549372488362.dat
-rwx------+ 1 jenkins None 2147484671 Jun 19 21:07 dst4338419869657228497.dat
-rwx------+ 1 jenkins None 2147484671 Feb 20 08:22 dst5702335999286369047.dat
-rwx------+ 1 jenkins None 2147484671 Jun 19 05:08 dst7728209470019621345.dat
-rwx------+ 1 jenkins None 2147484671 Feb 7 02:00 dst9261951980099793202.dat
-rwx------+ 1 jenkins None 2147484671 Jun 19 21:06 src14810603928291401966.dat
-rwx------+ 1 jenkins None 2147484671 Jun 19 05:06 src2088681814118365386.dat
```

Thie files are 2G each, often causing disk space issues on our machines. I dont think these files are important since theyre created in the Temp directory. Would be good to find their cause

ref https://github.com/adoptium/infrastructure/issues/2493#issuecomment-1185420927

Start by reviewing the .dat listings in the Temp directories of the three linked Windows test machines and the referenced infrastructure issue comment. Trace which test or maintenance activity creates the src, dst, and LargeGatheringWrite files. Done means the cause is identified and large orphaned files no longer accumulate or exhaust disk space.

Written by the indexing model from the issue text.