Fix: permit saving structural searches

[jensim]

It is currently not possible to save a structural search due to this

var patternTypeRegexp = lazyregexp.New(`(?i)\bpatternType:(literal|regexp|structural)\b`)

[rvantonder]

Hi @jensim, thanks for this! I'm going to double check that this is the only change we need to get structural saves searches to work. Tracking issue: #7316

[jensim]

Hi @jensim, thanks for this! I'm going to double check that this is the only change we need to get structural saves searches to work. Tracking issue: #7316

I patched my OSS instance with it and was able to save and load a structural search, but I guess e2e tests might be in order?

[codecov]

Codecov Report

Merging #17265 (3aaa4ed) into main (21b1b82) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #17265      +/-   ##
==========================================
- Coverage   52.10%   52.10%   -0.01%     
==========================================
  Files        1711     1711              
  Lines       85337    85337              
  Branches     7629     7629              
==========================================
- Hits        44465    44461       -4     
- Misses      36954    36959       +5     
+ Partials     3918     3917       -1     

Flag	Coverage Δ		*Carryforward flag
go	51.19% <ø> (-0.01%)	⬇️
integration	30.54% <ø> (ø)		Carriedforward from 21b1b82
storybook	30.10% <ø> (ø)		Carriedforward from 21b1b82
typescript	54.31% <ø> (ø)		Carriedforward from 21b1b82
unit	34.83% <ø> (ø)		Carriedforward from 21b1b82

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
cmd/frontend/graphqlbackend/saved_searches.go	32.25% <ø> (ø)
.../internal/codeintel/resolvers/graphql/locations.go	83.50% <0.00%> (-2.07%)	⬇️
...nal/campaigns/resolvers/changeset_apply_preview.go	58.97% <0.00%> (-1.71%)	⬇️

[rvantonder]

Hey @jensim this looks good--I pushed the changes to our CI and the build is green. I want to add an entry to our CHANGELOG but I couldn't edit this PR. I think this can work by checking a box, but it's easier for me to just approve this and get it merged, and will add the CHANGELOG separately.

[rvantonder]

Thanks again!