CLOUDP-316626: createSearchIndex command is marshaled incorrectly

[andreaangiolillo]

Proposed changes

Jira ticket: CLOUDP-316626

Bug:

The CLI is marshing directly the SDK struct into Bson for the createSearchIndex this cause fields in the structs such as charFilters to be transformed in their lowercase version charfilters.

atlas deployments search indexes create --deploymentName local9975 --type LOCAL -f search-index.json --watch
Error: (UnknownError) "userCommand.indexes[0].analyzers[0]" unrecognized fields ["charfilters", "tokenfilters"]

Fix:

As we are doing with other index such as ClusterSearchIndex, we first marsh the struct into json and then marsh into Bson to keep the same field names of the original SDK struct.

./bin/atlas deployments search indexes create --deploymentName local9975 --type LOCAL -f search-index.json --watch
Search index created with ID: 682dce72481bfa62cd0cb969

atlas deployments search indexes ls                                            
? Database sample_mflix
? Collection movies
ID                         NAME                 DATABASE       COLLECTION   STATUS   TYPE
682dce72481bfa62cd0cb969   custom_movie_index   sample_mflix   movies       READY    search

[github-actions]

Coverage Report 📈

Branch	Commit	Coverage
master	ced6b1f	25.1%
CLOUDP-316626	2f3fac9	25.1%
	Difference	0%