Add more linters to improve code readability (#19989)

Add nakedret, unconvert, wastedassign, stylecheck and nolintlint linters to improve code readability

- nakedret - https://github.com/alexkohler/nakedret - nakedret is a Go static analysis tool to find naked returns in functions greater than a specified function length.
- unconvert - https://github.com/mdempsky/unconvert - Remove unnecessary type conversions
- wastedassign - https://github.com/sanposhiho/wastedassign -  wastedassign finds wasted assignment statements.
- notlintlint -  Reports ill-formed or insufficient nolint directives
- stylecheck - https://staticcheck.io/docs/checks/#ST - keep style consistent
  - excluded: [ST1003 - Poorly chosen identifier](https://staticcheck.io/docs/checks/#ST1003) and [ST1005 - Incorrectly formatted error string](https://staticcheck.io/docs/checks/#ST1005)

integrations/git_test.go

@@ -150,7 +150,7 @@ func standardCommitAndPushTest(t *testing.T, dstPath string) (little, big string
 		defer PrintCurrentTest(t)()
 		little, big = commitAndPushTest(t, dstPath, "data-file-")
 	})
-	return
+	return little, big
 }
 
 func lfsCommitAndPushTest(t *testing.T, dstPath string) (littleLFS, bigLFS string) {
@@ -191,7 +191,7 @@ func lfsCommitAndPushTest(t *testing.T, dstPath string) (littleLFS, bigLFS strin
 			lockTest(t, dstPath)
 		})
 	})
-	return
+	return littleLFS, bigLFS
 }
 
 func commitAndPushTest(t *testing.T, dstPath, prefix string) (little, big string) {
@@ -210,7 +210,7 @@ func commitAndPushTest(t *testing.T, dstPath, prefix string) (little, big string
 			big = doCommitAndPush(t, bigSize, dstPath, prefix)
 		})
 	})
-	return
+	return little, big
 }
 
 func rawTest(t *testing.T, ctx *APITestContext, little, big, littleLFS, bigLFS string) {