Collapse blank lines between call args in blink to match MethodArgumentSpaceFixer

[TomasVotruba]

Problem

#160 regressed mautic blink parity (from 3 to 9 differing files, over the 0.07% gate). It made blink's shared reflowParen always preserve author-added blank lines between arguments. But php-cs-fixer's MethodArgumentSpaceFixer collapses those blanks, so blink kept 6 blank lines the PHP engine drops.

Bisect: parity was green through #159 (3 pre-existing diffs, under the gate) and first failed on #160.

Fix

Restore the per-rule distinction that matches each php-cs-fixer rule:

• method_argument_space collapses blank lines between arguments (matches MethodArgumentSpaceFixer).
• array and standalone-line reflows keep them (match their fixers in isolation).

method_argument_space still collapses the net output for promoted constructors, so the standalone-line rules keep their preserving behavior without breaking parity.

Verification

Full parity against mautic/mautic (psr12 + perCs + common + standaloneLine + cleanCode): 4548 files, 3 differing (0.066%, under the 0.07% gate). The 3 remaining diffs are pre-existing and unrelated (list-assignment reflow, two view-template indents).

go build, go vet, go test ./..., and gofmt all clean.