Switch to a stable SQL Server Docker image for tests

[nineinchnick]

Description

The CU13 version started misbehaving, so we switched to latest, but it's
also causing issues. CU14 was reported by other users to work.

Ref: microsoft/mssql-docker#899

Additional context and related issues

Release notes

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( ) Release notes are required. Please propose a release note for me.
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[ebyhr]

@wendigo Why did you close this PR?

[wendigo]

Doesn't work

[wendigo]

2024-09-19T10:37:57.4579729Z This program has encountered a fatal error and cannot continue running at Thu Sep 19 10:33:59 2024
2024-09-19T10:37:57.4580363Z The following diagnostic information is available:
2024-09-19T10:37:57.4580647Z 
2024-09-19T10:37:57.4580745Z        Reason: 0x00000001
2024-09-19T10:37:57.4581098Z        Signal: Unknown - Unknown signal 0 (0)
2024-09-19T10:37:57.4581547Z    Stacktrace: 00005585af37d144 00005585af37ccbf 00005585af37bc0c 
2024-09-19T10:37:57.4582043Z                00007fdbaa9e14b0 00007fdbaa9e1428 00007fdbaa9e302a 
2024-09-19T10:37:57.4582488Z                00005585af2ebde4 00005585af3c283e 00005585af3c2551 
2024-09-19T10:37:57.4582864Z                00005585af2fbae4 
2024-09-19T10:37:57.4583184Z       Process: 8 - sqlservr
2024-09-19T10:37:57.4583493Z        Thread: 68 (application thread 0xe4)
2024-09-19T10:37:57.4583938Z   Instance Id: feb4f775-e2eb-4269-9eb8-eb4b533a93c9
2024-09-19T10:37:57.4584396Z      Crash Id: c98a8588-2d27-4ca5-90e5-c0d36091842c
2024-09-19T10:37:57.4584943Z   Build stamp: b2ce95e3a6684060d1d3bb1264841a1a8fc1d501ed6d1cfdb89cfcdde8048253
2024-09-19T10:37:57.4585454Z  Distribution: Ubuntu 16.04.6 LTS
2024-09-19T10:37:57.4585746Z    Processors: 4
2024-09-19T10:37:57.4585996Z  Total Memory: 16766771200 bytes
2024-09-19T10:37:57.4586310Z     Timestamp: Thu Sep 19 10:33:59 2024
2024-09-19T10:37:57.4586539Z 
2024-09-19T10:37:57.4586630Z Ubuntu 16.04.6 LTS
2024-09-19T10:37:57.4586978Z Capturing core dump and information to /var/opt/mssql/log...
2024-09-19T10:37:57.4587484Z dmesg: read kernel buffer failed: Operation not permitted
2024-09-19T10:37:57.4587892Z No journal files were found.
2024-09-19T10:37:57.4588179Z No journal files were found.
2024-09-19T10:37:57.4588492Z Attempting to capture a dump with paldumper
2024-09-19T10:37:57.4588849Z Captured a dump with paldumper