Bump MongoDB.Driver from 2.25.0 to 2.27.0 in /Backend.Tests

[dependabot[bot]]

Bumps MongoDB.Driver from 2.25.0 to 2.27.0.

Release notes

Sourced from MongoDB.Driver's releases.

.NET Driver Version 2.27.0 Release Notes

This is the general availability release for the 2.27.0 version of the driver.

The main new features in 2.27.0 include:

• Support $sample aggregation operator - CSHARP-2659
• Implement Equals method for serializers in LINQ3 - CSHARP-3315
• Avoid Appending Write/Read Concern in Atlas Search Index Helper Commands - CSHARP-4839
• Disallow comma character in authMechanismProperties connection string value - CSHARP-5106
• Fix translation issue during serialization of numbers with differing sizes - CSHARP-5163
• Support Linux distros using libdl.so.2 CSHARP-4889
• Multiple bug fixes and improvements.

The full list of issues resolved in this release is available at CSHARP JIRA project.

Documentation on the .NET driver can be found here.

.NET Driver Version 2.26.0 Release Notes

This is the general availability release for the 2.26.0 version of the driver.

The main new features in 2.26.0 include:

• Support SelectMany inside Project/Select - CSHARP-5081
• Support Dictionary.ContainsValue in LINQ queries - CSHARP-2509
• Support string concatenation of mixed types - CSHARP-5071
• Enable use of native crypto in libmongocrypt bindings - CSHARP-4944
• Support serialization of Memory and ReadOnlyMemory structs - CSHARP-4807
• OIDC: support for GCP Identity Provider - CSHARP-4610
• Implement signing of NuGet packages - CSHARP-5050
• Direct read/write retries to another mongos if possible - CSHARP-3757
• Multiple bug fixes and improvements.

The full list of issues resolved in this release is available at CSHARP JIRA project.

Documentation on the .NET driver can be found here.

Commits

• 0aeadcf 2.27.0 Release notes (#1372)
• 29a8893 CSHARP-4889: Support Linux distros using libdl.so.2 (#1370)
• c436f22 ODATA-18: Add metadata to track Atlas usage (#1371)
• fc7df86 CSHARP-5106: Disallow comma character in authMechanismProperties conn… (#1354)
• 6747c43 CSHARP-5163: Translate fails when serializing different sized numbers (#1369)
• d09a511 CSHARP-5150: Coverity analysis defect 102677: Copy-paste error.
• 4eaf203 CSHARP-3315: Implement Equals for serializers.
• 17c4ed4 CSHARP-5148: Coverity analysis defect 102923: Dereference null return value.
• a47dce3 CSHARP-5154: Coverity analysis defect 138095: Dereference null return value.
• 91222c9 CSHARP-5165: Fix Evergreen link in SSDLC report (#1368)
• Additional commits viewable in compare view

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This change is 

[github-actions[bot]]

⚠️ Commit Message Format Issues ⚠️

commit 49deb4adec: 3: B1 Line exceeds max length (93>80): "Bumps MongoDB.Driver from 2.25.0 to 2.27.0." 5: B1 Line exceeds max length (85>80): "- Commits"

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 75.12%. Comparing base (565a7f7) to head (49deb4a).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #3200 +/- ## ========================================== + Coverage 75.08% 75.12% +0.03% ========================================== Files 275 275 Lines 10431 10431 Branches 1237 1237 ========================================== + Hits 7832 7836 +4 + Misses 2239 2236 -3 + Partials 360 359 -1 ``` | [Flag](https://app.codecov.io/gh/sillsdev/TheCombine/pull/3200/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sillsdev) | Coverage Δ | | |---|---|---| | [backend](https://app.codecov.io/gh/sillsdev/TheCombine/pull/3200/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sillsdev) | `84.14% <ø> (+0.08%)` | :arrow_up: | | [frontend](https://app.codecov.io/gh/sillsdev/TheCombine/pull/3200/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sillsdev) | `67.05% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sillsdev#carryforward-flags-in-the-pull-request-comment) to find out more.

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[dependabot[bot]]

Looks like MongoDB.Driver is up-to-date now, so this is no longer needed.