MDEV-26991: CURRENT_TEST: main.mysql_binary_zero_insert 'grep' is not...

MDEV-26991: CURRENT_TEST: main.mysql_binary_zero_insert 'grep' is not recognized as an internal or external command, operable program or batch file.

Removed grep from mysqldump command stream and instead,
extend the search_file pattern to search for rows containing
binary zeros instead of any occurance of '00' in the input

mysql-test/r/mysql_binary_zero_insert.result

@@ -32,8 +32,8 @@ COUNT(*)=8
 # Note: We only look for 00 because the 5c only served as an escape
 #       in parsing.
 #
-# MYSQL_DUMP test tb --hex-blob | grep INSERT > MYSQL_TMP_DIR/dump.sql
-FOUND 10 /00/ in dump.sql
+# MYSQL_DUMP test tb --hex-blob > MYSQL_TMP_DIR/dump.sql
+FOUND 8 /\([0-9]+,0x([1-9][0-9])*00([1-9][0-9])*\)/ in dump.sql
 #
 # Ensure data consistency on mysqlbinlog replay
 #

mysql-test/t/mysql_binary_zero_insert.test

@@ -114,9 +114,9 @@ SELECT COUNT(*)=8 from tb;
 --echo # Note: We only look for 00 because the 5c only served as an escape
 --echo #       in parsing.
 --echo #
---echo # MYSQL_DUMP test tb --hex-blob | grep INSERT > MYSQL_TMP_DIR/dump.sql
---exec $MYSQL_DUMP test tb --hex-blob | grep INSERT > $MYSQL_TMP_DIR/dump.sql
---let SEARCH_PATTERN= 00
+--echo # MYSQL_DUMP test tb --hex-blob > MYSQL_TMP_DIR/dump.sql
+--exec $MYSQL_DUMP test tb --hex-blob > $MYSQL_TMP_DIR/dump.sql
+--let SEARCH_PATTERN= \([0-9]+,0x([1-9][0-9])*00([1-9][0-9])*\)
 --let SEARCH_FILE= $MYSQL_TMP_DIR/dump.sql
 --source include/search_pattern_in_file.inc