feat(rest): new endpoint merge components

[muhammadali9699]

Please provide a summary of your changes here.

• This PR is to merge two components

Issue: #1957

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How To Test?

Create two components
Get components ids from couch db and pass it to the api as a param
add body of component with changes made in component (sample given below)
{
"type":"component",
"name":"Deemo comp 4",
"attachments":[
],
"createdOn":"2023-05-17",
"componentType":"INNER_SOURCE",
"createdBy":"admin@sw360.org",
"subscribers":[
],
"moderators":[
],
"roles":{
},
"visbility":"EVERYONE",
"externalIds":{
},
"additionalData":{
},
"releases":[
],
"categories":[
"virtual-machine",
"big-data",
"javaee"
]
}

###Screenshot

[eldrin30]

@muhammadali9699, resolve the conflicts

[eldrin30]

Testing was successful

[heliocastro]

Please rebase

[muhammadali9699]

@heliocastro Rebase successful.

[ag4ums]

PATCH seems more appropriate here as the component is getting updated

[eldrin30]

Code looks good, kindly rebase

[muhammadali9699]

@eldrin30 code rebased.

[eldrin30]

As discussed, since its a new endpoint, kindly add the same in component.adoc file

[muhammadali9699]

@eldrin30 Documentation added please verify.

[eldrin30]

Code looks good :)