Implement sematic/lexcial search feature in datagateway search

[kennethnym]

Description

This PR adds a dropdown that lets the user choose to search with either Lucene or the new ML API, which provides endpoints for performing semantic/lexical search. The ML API utilizes OpenSearch and LLM to perform search operations.

DataGateway.Search.and.8.more.pages.-.Work.-.Microsoft.Edge.2023-08-31.17-47-19.mp4

• Semantic/lexical search results are sorted based on their relevance to the query, from the most relevant to the least. They are displayed in a table just like other types of search results.
• When semantic/lexical search is enabled, other search result types are disabled and the tabs are not shown
• Only 50 results are shown at the moment. This is arbitrary (n_top_results)
• The backend powering the feature has a temporary URL, so I just hardcoded it in the code, similar to Suggest similar investigations based on the currently displayed investigation on investigation landing page #1522

Please feel free to suggest changes to the UI.

cc @agbeltran

Testing instructions

Add a set up instructions describing how the reviewer should test the code

• Review code
• Check Actions build
• Review changes to test coverage

Agile board tracking

Closes #1526

[agbeltran]

cc @saifulkhan

[codecov]

Codecov Report

Patch coverage: 71.77% and project coverage change: -0.43% ⚠️

Comparison is base (ec7d542) 96.20% compared to head (159eee0) 95.78%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1527      +/-   ##
===========================================
- Coverage    96.20%   95.78%   -0.43%     
===========================================
  Files          161      164       +3     
  Lines         6885     6975      +90     
  Branches      2139     2154      +15     
===========================================
+ Hits          6624     6681      +57     
- Misses         240      273      +33     
  Partials        21       21              

Flag	Coverage Δ
common	94.74% <47.82%> (-0.80%)	⬇️
dataview	96.85% <ø> (ø)
download	96.32% <ø> (ø)
search	95.75% <85.89%> (-0.76%)	⬇️

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Files Changed	Coverage Δ
packages/datagateway-common/src/app.types.tsx	100.00% <ø> (ø)
packages/datagateway-common/src/api/index.tsx	94.88% <33.33%> (-1.83%)	⬇️
packages/datagateway-common/src/api/ml.ts	47.36% <47.36%> (ø)
packages/datagateway-common/src/api/lucene.tsx	83.67% <55.55%> (-16.33%)	⬇️
...teway-search/src/searchPageContainer.component.tsx	92.41% <82.22%> (-2.36%)	⬇️
...search/src/search/searchTypeDropdown.component.tsx	85.71% <85.71%> (ø)
...teway-search/src/table/mlSearchTable.component.tsx	92.00% <92.00%> (ø)
...ateway-search/src/searchBoxContainer.component.tsx	100.00% <100.00%> (ø)

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[kennethnym]

Updated demo video to reflect the new changes.