Remove foo={proj} workaround from sources

[arch0345]

Closes #2628

Also use {wkid} parameter instead of hardcoding bboxSR and imageSR values

[tyrasd]

Looks good to me (matches what I had stupidly done in #2631 independently).

I'm not sure if scripts/sources/oceania/au/nsw/NSW_SS_Floods.js is still relevant/used at all or not, but there are would also be one remaining place with hardcoded 3857 and foo={proj}:

-            result.properties.url = `https://portal.spatial.nsw.gov.au/server/rest/services/${service}/MapServer/export?f=image&format=png&transparent=true&imageSR=3857&bboxSR=3857&bbox={bbox}&size={width},{height}&layers=show:${id}&foo={proj}`;
+            result.properties.url = `https://portal.spatial.nsw.gov.au/server/rest/services/${service}/MapServer/export?f=image&format=png&transparent=true&imageSR={wkid}&bboxSR={wkid}&bbox={bbox}&size={width},{height}&layers=show:${id}`;

[arch0345]

Looks good to me (matches what I had stupidly done in #2631 independently).

I'm not sure if scripts/sources/oceania/au/nsw/NSW_SS_Floods.js is still relevant/used at all or not, but there are would also be one remaining place with hardcoded 3857 and foo={proj}:

-            result.properties.url = `https://portal.spatial.nsw.gov.au/server/rest/services/${service}/MapServer/export?f=image&format=png&transparent=true&imageSR=3857&bboxSR=3857&bbox={bbox}&size={width},{height}&layers=show:${id}&foo={proj}`;
+            result.properties.url = `https://portal.spatial.nsw.gov.au/server/rest/services/${service}/MapServer/export?f=image&format=png&transparent=true&imageSR={wkid}&bboxSR={wkid}&bbox={bbox}&size={width},{height}&layers=show:${id}`;

Good catch, I was just searching through the .geojson files. I noticed that the PR check script is still flagging the missing {proj} parameters, would it be possible for {wkid} to be added as a synonym for this too?

[tyrasd]

I've pushed 3398fc0 to this branch which adds {wkid} also to the strict_check.py script.