[test] Add some more known crashers

Author: hamishknight

validation-test/IDE/crashers/26ba10dc4c4e7f04.swift

@@ -0,0 +1,10 @@
+// {"kind":"complete","original":"9af9ff34","signature":"swift::InterfaceTypeRequest::cacheResult(swift::Type) const","signatureAssert":"Assertion failed: (!type->is<InOutType>() && \"Interface type must be materializable\"), function cacheResult"}
+// RUN: not --crash %target-swift-ide-test -code-completion -batch-code-completion -skip-filecheck -code-completion-diagnostics -source-filename %s
+[
+  [
+    #^^#
+  ].reduce(
+    [:][0] {
+      $a, b in
+    })
+]

validation-test/IDE/crashers/3840b5540c4b70be.swift

@@ -0,0 +1,5 @@
+// {"kind":"complete","original":"c2850df8","signature":"swift::ValueDecl::dumpRef(llvm::raw_ostream&) const","signatureAssert":"Assertion failed: (ext->canNeverBeBound() && \"Should have been bound by bindExtensions\"), function evaluate"}
+// RUN: not --crash %target-swift-ide-test -code-completion -batch-code-completion -skip-filecheck -code-completion-diagnostics -source-filename %s
+@abi(
+  extension { # a(#^^#<#declaration#>)
+  <#declaration#>

validation-test/compiler_crashers_2/014ab64f0056db9e.swift

@@ -0,0 +1,4 @@
+// {"kind":"typecheck","original":"470b69c1","signature":"swift::constraints::ConstraintSystem::matchFunctionResultTypes(swift::Type, swift::Type, swift::optionset::OptionSet<swift::constraints::ConstraintSystem::TypeMatchFlags, unsigned int>, swift::constraints::ConstraintLocatorBuilder)","signatureAssert":"Assertion failed: (isDecl() && \"only makes sense for declaration choices\"), function getFunctionRefInfo"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+(a:-).a {
+}(<#expression#>)

validation-test/compiler_crashers_2/6235b4422a78fa73.swift

@@ -0,0 +1,7 @@
+// {"kind":"typecheck","signature":"swift::rewriting::RewriteContext::getRelativeTermForType(swift::CanType, llvm::ArrayRef<swift::rewriting::Term>)","signatureAssert":"Assertion failed: (result.back().getKind() != Symbol::Kind::Shape), function getRelativeTermForType"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+// https://github.com/swiftlang/swift/issues/84490
+struct a < b > {
+  func
+    c < each d where (repeat each d , b) == b>()
+}