[clang] [Format] Configure ASSIGN_OR_RETURN macros for Google style (PR #200210)

[Jesse Rosenstock via cfe-commits]

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@@ -301,6 +309,109 @@ TEST_F(FormatTestMacroExpansion, IndentChildrenWithinMacroCall) {
                Style);
 }
 
+// clang-format off
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jmr wrote:

I have trimmed this down.  In messing with the test, I see that the formatting is suboptimal for what should be one-liner functions, seemingly due to an existing bug.

https://github.com/llvm/llvm-project/pull/200210