linter: remove deadcode linter check for generic item

[Pennyzct]

ARM CI is failing, since we switch to the new golangci-lint.
Copy log from #1414:

18:09:54 func genericMemoryTopology(memoryMb, hostMemoryMb uint64, slots uint8, memoryOffset uint32) govmmQemu.Memory {
18:09:54      ^
18:09:54 cli/kata-check.go:55:2: `genericCPUFlagsTag` is unused (deadcode)
18:09:54 	genericCPUFlagsTag    = "flags"      // nolint: varcheck, unused
18:09:54 	^
18:09:54 cli/kata-check.go:56:2: `genericCPUVendorField` is unused (deadcode)
18:09:54 	genericCPUVendorField = "vendor_id"  // nolint: varcheck, unused
18:09:54 	^
18:09:54 cli/kata-check.go:57:2: `genericCPUModelField` is unused (deadcode)
18:09:54 	genericCPUModelField  = "model name" // nolint: varcheck, unused
18:09:54 	^
18:09:54 cli/kata-check_test.go:31:6: `testCPUData` is unused (deadcode)
18:09:54 type testCPUData struct {
18:09:54      ^
18:09:54 cli/kata-check_test.go:151:6: `genericTestGetCPUDetails` is unused (deadcode)
18:09:54 func genericTestGetCPUDetails(t *testing.T, validVendor string, validModel string, validContents string, data []testCPUDetail) {
18:09:54      ^
18:10:07 Build step 'Execute shell' marked build as failure

We need to remove deadcode linter for these generic* items. PR is on the way.