Convert remote repository numeric fields to pointers to avoid omitting

[sverdlov93]

• All tests passed. If this feature is not already covered by the tests, I added new tests.
• All static analysis checks passed.
• This pull request is on the dev branch.
• I used gofmt for formatting the code before submitting the pull request.

---

Convert int fields to *int to avoid them not being sent if the number is 0

SocketTimeoutMillis               *int                    `json:"socketTimeoutMillis,omitempty"`
RetrievalCachePeriodSecs          *int                    `json:"retrievalCachePeriodSecs,omitempty"`
MetadataRetrievalTimeoutSecs      *int                    `json:"metadataRetrievalTimeoutSecs,omitempty"`
MissedRetrievalCachePeriodSecs    *int                    `json:"missedRetrievalCachePeriodSecs,omitempty"`
UnusedArtifactsCleanupPeriodHours *int                    `json:"unusedArtifactsCleanupPeriodHours,omitempty"`
AssumedOfflinePeriodSecs          *int                    `json:"assumedOfflinePeriodSecs,omitempty"`

should fix jfrog/jfrog-cli#2172