Fix Cert C++ warnings reported by Cppcheck Premium

[danmar]

Warnings:

lib/symboldatabase.h:549:27: error: Guarantee that container indices and iterators are within the valid range [premium-cert-ctr50-cpp]
        return mDimensions[index_].num;
                          ^
lib/symboldatabase.h:557:27: error: Guarantee that container indices and iterators are within the valid range [premium-cert-ctr50-cpp]
        return mDimensions[index_].known;
                          ^
lib/symboldatabase.cpp:2193:20: error: Guarantee exception safety. An exception during allocation would violate the exception safety rules. [premium-cert-err56-cpp]
        mValueType = new ValueType(*var.mValueType);
                   ^
lib/symboldatabase.cpp:2191:5: note: Deallocated mValueType
    delete mValueType;
    ^
lib/symboldatabase.cpp:2193:20: note: Reallocated mValueType
        mValueType = new ValueType(*var.mValueType);
                   ^
lib/symboldatabase.cpp:2350:16: error: Guarantee exception safety. An exception during allocation would violate the exception safety rules. [premium-cert-err56-cpp]
    mValueType = new ValueType(valueType);
               ^
lib/symboldatabase.cpp:2349:5: note: Deallocated mValueType
    delete mValueType;
    ^
lib/symboldatabase.cpp:2350:16: note: Reallocated mValueType
    mValueType = new ValueType(valueType);
               ^
lib/templatesimplifier.cpp:242:17: error: Noexcept function TokenAndName may exit with an exception. [premium-cert-err55-cpp]
        mToken->templateSimplifierPointer(this);
                ^

[danmar]

problem: calling method that is not marked with NOEXCEPT