Broken JSON metadata blocks file loading

[tlnagy]

I need to thoroughly diagnose this, but I have multiple MicroManager images that have broken embedded JSON comments that cause the loading to come to a screeching halt at

OMETIFF.jl/src/files.jl

Line 200 in 7134699

metadata = JSON.parse(String(metadata_bytes))

Examples (for later reference) include

/mnt/eurekapool/data/2022/220720_fxm_collagen_minimalprocess/exp2_collagen_fxm_chemotaxis_1/exp2_collagen_fxm_chemotaxis_1_MMStack.ome.tif

While the longer term fix is clearly to identify why this is happening, the shorter term fix is to abort and throw a warning. This is solely for nice-to-have metadata and is fine if it can't be read.