Reset config.defer_load to its initial value in a unit test

[maximlt]

#5244 made a change/fix to pn.config that consists of calling the watchers of a config Parameter when its value is set in a curdoc context. I think that exposed a bug in the test suite where a unit test was setting config.defer_load to True without resetting it to False. There's indeed a global callback that updates ParamMethod when config.defer_load changes, which wasn't triggered before #5244, but is now triggered and made test_get_param_function_pane_type fail:

panel/panel/param.py

Lines 946 to 948 in bc62716

	@param.depends(config.param.defer_load, watch=True)
	def _update_defer_load_default(default_value):
	ParamMethod.param.defer_load.default = default_value

This should fix the test suite that is currently failing.

[codecov]

Codecov Report

Merging #5285 (bc62716) into main (d84d043) will increase coverage by 43.26%.
The diff coverage is 87.50%.

@@             Coverage Diff             @@
##             main    #5285       +/-   ##
===========================================
+ Coverage   40.54%   83.81%   +43.26%     
===========================================
  Files         274      274               
  Lines       39684    39699       +15     
===========================================
+ Hits        16089    33272    +17183     
+ Misses      23595     6427    -17168     

Flag	Coverage Δ
ui-tests	40.52% <0.00%> (-0.02%)	⬇️
unitexamples-tests	73.76% <87.50%> (?)

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Impacted Files	Coverage Δ
panel/tests/test_config.py	99.18% <87.50%> (+84.89%)	⬆️

... and 197 files with indirect coverage changes

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[philippjfr]

Thanks!