Fix Travis grep script to use PCRE to actually match things (#47065)

Several of the greps were missing the `-P` switch which caused them to 
fail to match things. The EOL grep also wasn't working right so I 
replaced it with the one I added to TGMC.

code/modules/unit_tests/component_tests.dm

@@ -9,4 +9,4 @@
 		if(dupe_type && !ispath(dupe_type))
 			bad_dts += t
 	if(length(bad_dms) || length(bad_dts))
-		Fail("Components with invalid dupe modes: ([bad_dms.Join(",")]) ||| Components with invalid dupe types: ([bad_dts.Join(",")])")
+		Fail("Components with invalid dupe modes: ([bad_dms.Join(",")]) ||| Components with invalid dupe types: ([bad_dts.Join(",")])")

code/modules/unit_tests/subsystem_init.dm

@@ -4,4 +4,4 @@
 		if(ss.flags & SS_NO_INIT)
 			continue
 		if(!ss.initialized)
-			Fail("[ss]([ss.type]) is a subsystem meant to initialize but doesn't get set as initialized.")
+			Fail("[ss]([ss.type]) is a subsystem meant to initialize but doesn't get set as initialized.")

code/modules/unit_tests/timer_sanity.dm

@@ -1,3 +1,3 @@
 /datum/unit_test/timer_sanity/Run()
 	if(SStimer.bucket_count < 0)
-		Fail("SStimer is going into negative bucket count from something")
+		Fail("SStimer is going into negative bucket count from something")