Pull upstream (API refactoring) and update tests

[openroad-ci]

Summary

• Adapt all cpp/tcl test files to match upstream OpenSTA API changes after pulling latest from parallaxsw/OpenSTA
• Upstream commit: parallaxsw/OpenSTA@d90bf7d9 (rename Report virtuals to warnMsg etc)
• 9 test files updated, no source code changes
• All 2534 tests pass (100%)

Upstream changes by module

• Verilog/Network: string* output params → string return values (remove & from call sites)
• Util: reportLineString → reportLine/report, printf format → std::format ({})
• Graph: Delay type refactored from float to class, added StaState/DelayOpsScalar test fixture
• Liberty: model APIs updated (value semantics, shared_ptr<TableModel>, PocvMode)
• Sdc: EXPECT_STREQ → EXPECT_EQ for std::string, asString → to_string, avoid unset_clock_groups -all (upstream iterator invalidation bug)
• Search: EXPECT_STREQ → EXPECT_EQ for GroupPath::name()
• Spice: streamPrint → sta::print with std::format specifiers

Test plan

• Full build passes (make -j)
• All 2534 ctest tests pass (100%)

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✅ jhkim-pii
❌ jjcherry56
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[maliberty]

@dsengupta0628 please give a first review

[dsengupta0628]

This looks fine- everything is contained within */test/ module

[dsengupta0628]

I picked up commit aac881a from this branch: secure-bump-opensta-0321 into my branch sta_update_upstream_lvf_stuff, and verified it compiles fine too. Updated my PR with this

[dsengupta0628]

#318 already combines these changes. And I picked specific commit from Jaehyun that enables STA compilation