follow up #20109; remove shallow seqs/strings for ORC (#20502)

* remove `shallow` seqs/strings for ORC

* add a changelog item

* change url of DelaunayNim

tests/collections/tseq.nim

@@ -175,12 +175,14 @@ when not defined(nimseqsv2):
       var emptySeq: seq[int] = newSeq[int]()
       block:
         var t = @[1,2,3]
-        shallow(nilSeq)
+        when defined(gcRefc):
+          shallow(nilSeq)
         t = nilSeq
         doAssert t == @[]
       block:
         var t = @[1,2,3]
-        shallow(emptySeq)
+        when defined(gcRefc):
+          shallow(emptySeq)
         t = emptySeq
         doAssert t == @[]
       block:

tests/converter/t7097.nim

@@ -10,8 +10,8 @@ proc initBytesRange*(s: var Bytes, ibegin = 0, iend = -1): BytesRange =
   let e = if iend < 0: s.len + iend + 1
           else: iend
   assert ibegin > 0 and e <= s.len
-  
-  shallow(s)
+  when defined(gcRefc):
+    shallow(s)
   result.bytes = s
   result.ibegin = ibegin
   result.iend = e

tests/converter/t7098.nim

@@ -14,8 +14,8 @@ proc initBytesRange*(s: var Bytes, ibegin = 0, iend = -1): BytesRange =
   let e = if iend < 0: s.len + iend + 1
           else: iend
   assert ibegin >= 0 and e <= s.len
-
-  shallow(s)
+  when defined(gcRefc):
+    shallow(s)
   result.bytes = s
   result.ibegin = ibegin
   result.iend = e

tests/stdlib/tstrutils2.nim

@@ -18,7 +18,8 @@ block: # setLen
 block: # forceCopy
   var a: string
   a = "foo"
-  shallow(a)
+  when defined(gcRefc):
+    shallow(a)
   var b: string
   b = a
   doAssert b[0].addr == a[0].addr

tests/system/tnilconcats.nim

@@ -26,7 +26,8 @@ when true:
 
   # casting an empty string as sequence with shallow() should not segfault
   var s2: string
-  shallow(s2)
+  when defined(gcRefc):
+    shallow(s2)
   s2 &= "foo"
   doAssert s2 == "foo"