Update RHCOS to OCP version map (#2332)

Co-authored-by: sebrandon1 <[email protected]>

tests/platform/operatingsystem/files/rhcos_version_map

@@ -355,6 +355,7 @@
 4.15.24 / 415.92.202407231021-0
 4.15.25 / 415.92.202407301159-0
 4.15.26 / 415.92.202408020931-0
+4.15.27 / 415.92.202408020931-0
 4.15.3 / 415.92.202403080220-0
 4.15.5 / 415.92.202403191241-0
 4.15.6 / 415.92.202403270524-0
@@ -434,6 +435,7 @@
 4.5.0-0.hotfix-2020-08-24-185832 / 45.82.202008211203-0
 4.5.0-0.hotfix-2020-11-28-021842 / 45.82.202011260629-0
 4.5.0-rc.2 / 45.82.202006190229-0
+4.5.0-rc.4 / 45.82.202006231429-0
 4.5.0-rc.5 / 45.82.202007010247-0
 4.5.0-rc.6 / 45.82.202007020010-0
 4.5.0-rc.7 / 45.82.202007062333-0