Add recursion protection to EntityReferenceItem normalizers

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The HAL module has been removed from core, so moving this to the new contrib project.

I don't think this is the correct contrib project of the HAL module.

+++ b/core/modules/hal/src/Normalizer/EntityReferenceItemNormalizer.php
@@ -80,8 +80,15 @@ public function normalize($field_item, $format = NULL, array $context = []) {
+    else {

we don't need this else, as we returned above

Still needs work for task 2 in the issue summary

Just rerolling #45 to hal module 2.x

Looks like we need to update tests to allow for the block content path changes in core in 10.1

@larowlan, you are likely correct.

I just checked D10

A custom block edit path looks like this:
/block/99

Have to look closer at the above tests, hope this helps