common: merge all *ToPtr methods to one generic ToPtr

After introducing Go 1.18 to a project, it's required by law to convert at
least one method to a generic one.

Everyone hates IntToPtr, StringToPtr, BoolToPtr and Uint64ToPtr, so let's
convert them to the ultimate generic ToPtr one.

Signed-off-by: Ondřej Budai <ondrej@budai.cz>

internal/common/pointers.go

@@ -1,17 +1,5 @@
 package common
 
-func IntToPtr(x int) *int {
-	return &x
-}
-
-func Uint64ToPtr(x uint64) *uint64 {
-	return &x
-}
-
-func BoolToPtr(x bool) *bool {
-	return &x
-}
-
-func StringToPtr(x string) *string {
+func ToPtr[T any](x T) *T {
 	return &x
 }