Suppress clang-analyzer-security.FloatLoopCounter warnings

* Suppress also the alias check name cert-flp30-c.
* Leave comment in code for code owners to rewrite
  the loop with integer counters.

Bug: 265171053
Test: presubmit; tidy-system-core-storaged_subset
Change-Id: I8297161366a7a2e1c7cdbec8efb7a8e9e435166a