update test files for upstream API refactoring
Adapt all cpp/tcl test files to match upstream OpenSTA API changes:
- string* output params changed to string return values (Verilog, Network)
- Report methods renamed (reportLineString->reportLine, printf->std::format)
- Delay type refactored from float typedef to class (Graph)
- Liberty model APIs updated (value semantics, shared_ptr, PocvMode)
- EXPECT_STREQ -> EXPECT_EQ for std::string returns (Sdc, Search)
- streamPrint -> sta::print with std::format specifiers (Spice)
- Avoid unset_clock_groups -all path (upstream iterator invalidation bug)
Signed-off-by: Jaehyun Kim <jhkim@precisioninno.com>
59663ab640