nfstest: add results visualization support

Add make nfstests-results-visualize target to generate HTML visualization
of NFS test results. This processes test logs from workflows/nfstest/results/last-run
and creates a self-contained HTML report with charts and statistics.

The visualization includes:
- Overall test summary with pass/fail statistics
- Interactive pie charts for test results
- Detailed results grouped by NFS protocol version
- Collapsible sections for easy navigation
- Test configuration details

Usage: make nfstests-results-visualize
Output: workflows/nfstest/results/html/

This makes it easy to analyze test results and share them by simply
copying the html directory via scp.

Generated-by: Claude AI
Signed-off-by: Luis Chamberlain <[email protected]>

Author: mcgrof

workflows/Makefile

@@ -50,6 +50,10 @@ ifeq (y,$(CONFIG_KDEVOPS_WORKFLOW_ENABLE_NFSTEST))
 include workflows/nfstest/Makefile
 endif # CONFIG_KDEVOPS_WORKFLOW_ENABLE_NFSTEST == y
 
+# Always available nfstest visualization target
+nfstests-results-visualize:
+	$(Q)bash $(shell pwd)/workflows/nfstest/scripts/visualize_nfstest_results.sh
+
 ifeq (y,$(CONFIG_KDEVOPS_WORKFLOW_ENABLE_SYSBENCH))
 include workflows/sysbench/Makefile
 endif # CONFIG_KDEVOPS_WORKFLOW_ENABLE_SYSBENCH == y

workflows/nfstest/Makefile

@@ -99,6 +99,7 @@ nfstest-help-menu:
 	@echo "nfstest options:"
 	@echo "nfstest                              - Git clone nfstest and install it"
 	@echo "nfstest-{baseline,dev}               - Run selected nfstests on baseline or dev hosts and collect results"
+	@echo "nfstests-results-visualize           - Generate HTML visualization of test results"
 	@echo ""
 
 HELP_TARGETS += nfstest-help-menu