west: runners: add option 'v' prefix to OpenOCD version string

The Espressif branch of OpenOCD uses the version string "v0.12.0" instead
of "0.12.0" causing the version regex match to fail.

Add an optional 'v' prefix to avoid the failure.

(cherry picked from commit 3d42a1c)

Original-Fixes: #83373
Original-Signed-off-by: Eric Holmberg <eric.holmberg@northriversystems.co.nz>
GitOrigin-RevId: 3d42a1c
Cr-Build-Id: 8726132470642320465
Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8726132470642320465
Copybot-Job-Name: zephyr-main-copybot-downstream
Change-Id: I17a9f06c0895b3ff9d6a8247eed92e2e0a6d8efc
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/6167010
Tested-by: Keith Short <keithshort@chromium.org>
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Commit-Queue: Keith Short <keithshort@chromium.org>
Reviewed-by: Keith Short <keithshort@chromium.org>

scripts/west_commands/runners/openocd.py

@@ -222,7 +222,7 @@ def read_version(self):
         out = self.check_output([self.openocd_cmd[0], '--version'],
                                 stderr=subprocess.STDOUT).decode()
 
-        version_match = re.search(r"Open On-Chip Debugger (\d+.\d+.\d+)", out)
+        version_match = re.search(r"Open On-Chip Debugger v?(\d+.\d+.\d+)", out)
         version = version_match.group(1).split('.')
 
         return [to_num(i) for i in version]